calling the open method on a select menu does not work in latest or 1.1rc-1
it does not throw any errors it just does nothing.
jsfiddle showing issue:
I think this method only works for custom menus because the native menus rely on your actually tapping the native select to open the native menu (it's positioned on top of the styled select, but invisible)
I'll note this in the docs.
Added note that the select "open" method only works with custom menus…
…. Fixes #3943